1 files changed, 148 insertions, 0 deletions
diff --git a/plugins/musepack/mpc/mpcdec.h b/plugins/musepack/mpc/mpcdec.h
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+++ b/plugins/musepack/mpc/mpcdec.h
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+/*
+  Copyright (c) 2005-2009, The Musepack Development Team
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are
+  met:
+
+  * Redistributions of source code must retain the above copyright
+  notice, this list of conditions and the following disclaimer.
+
+  * Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the following
+  disclaimer in the documentation and/or other materials provided
+  with the distribution.
+
+  * Neither the name of the The Musepack Development Team nor the
+  names of its contributors may be used to endorse or promote
+  products derived from this software without specific prior
+  written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+/// \file mpcdec.h
+/// Top level include file for libmpcdec.
+#ifndef _MPCDEC_H_
+#define _MPCDEC_H_
+#ifdef WIN32
+#pragma once
+#endif
+
+#include "reader.h"
+#include "streaminfo.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum {
+    MPC_FRAME_LENGTH          = (36 * 32),              ///< Samples per mpc frame
+    MPC_DECODER_BUFFER_LENGTH = (MPC_FRAME_LENGTH * 4), ///< Required buffer size for decoder
+    MPC_DECODER_SYNTH_DELAY   = 481
+};
+
+typedef struct mpc_decoder_t mpc_decoder;
+typedef struct mpc_demux_t mpc_demux;
+
+typedef struct mpc_bits_reader_t {
+	unsigned char * buff; /// pointer on current byte
+	unsigned int count; /// unread bits in current byte
+} mpc_bits_reader;
+
+typedef struct mpc_frame_info_t {
+	mpc_uint32_t samples;		/// number of samples in the frame (counting once for multiple channels)
+	mpc_int32_t bits;			/// number of bits consumed by this frame (-1) if end of stream
+	MPC_SAMPLE_FORMAT * buffer;	/// frame samples buffer (size = samples * channels * sizeof(MPC_SAMPLE_FORMAT))
+	mpc_bool_t is_key_frame; 	/// 1 if this frame is a key frame (first in block) 0 else. Set by the demuxer.
+} mpc_frame_info;
+
+typedef struct mpc_chap_info_t {
+	mpc_uint64_t sample;	/// sample where the chapter starts
+	mpc_uint16_t gain;		/// replaygain chapter value
+	mpc_uint16_t peak;		/// peak chapter loudness level
+	mpc_uint_t tag_size;	/// size of the tag element (0 if no tag is present for this chapter)
+	char * tag;				/// pointer to an APEv2 tag without the preamble
+} mpc_chap_info;
+
+/// Initializes mpc decoder with the supplied stream info parameters.
+/// \param si streaminfo structure indicating format of source stream
+/// \return pointer on the initialized decoder structure if successful, 0 if not
+MPC_API mpc_decoder * mpc_decoder_init(mpc_streaminfo *si);
+
+/// Releases input mpc decoder
+MPC_API void mpc_decoder_exit(mpc_decoder *p_dec);
+
+/**
+ * Sets decoder sample scaling factor.  All decoded samples will be multiplied
+ * by this factor. Useful for applying replay gain.
+ * @param scale_factor multiplicative scaling factor
+ */
+MPC_API void mpc_decoder_scale_output(mpc_decoder *p_dec, double scale_factor);
+
+MPC_API void mpc_decoder_decode_frame(mpc_decoder * d, mpc_bits_reader * r, mpc_frame_info * i);
+
+// This is the gain reference used in old replaygain
+#define MPC_OLD_GAIN_REF 64.82
+
+/**
+ * init demuxer
+ * @param p_reader initialized mpc_reader pointer
+ * @return an initialized mpc_demux pointer
+ */
+MPC_API mpc_demux * mpc_demux_init(mpc_reader * p_reader);
+/// free demuxer
+MPC_API void mpc_demux_exit(mpc_demux * d);
+/**
+ * Calls mpc_decoder_scale_output to set the scaling factor according to the
+ * replay gain stream information and the supplied ouput level
+ * @param d pointer to a musepack demuxer
+ * @param level the desired ouput level (in db). Must be MPC_OLD_GAIN_REF (64.82 db) if you want to get the old replaygain behavior
+ * @param use_gain set it to MPC_TRUE if you want to set the scaling factor according to the stream gain
+ * @param use_title MPC_TRUE : uses the title gain, MPC_FALSE : uses the album gain
+ * @param clip_prevention MPC_TRUE : uses cliping prevention
+ */
+MPC_API void mpc_set_replay_level(mpc_demux * d, float level, mpc_bool_t use_gain,
+                          mpc_bool_t use_title, mpc_bool_t clip_prevention);
+/// decode frame
+MPC_API mpc_status mpc_demux_decode(mpc_demux * d, mpc_frame_info * i);
+/// get streaminfo
+MPC_API void mpc_demux_get_info(mpc_demux * d, mpc_streaminfo * i);
+/// seeks to a given sample
+MPC_API mpc_status mpc_demux_seek_sample(mpc_demux * d, mpc_uint64_t destsample);
+/// seeks to a given second
+MPC_API mpc_status mpc_demux_seek_second(mpc_demux * d, double seconds);
+
+/// \return the current position in the stream (in bits) from the beginning of the file
+MPC_API mpc_seek_t mpc_demux_pos(mpc_demux * d);
+
+/// chapters : only for sv8 streams
+/**
+ * Gets the number of chapters in the stream
+ * @param d pointer to a musepack demuxer
+ * @return the number of chapters found in the stream
+ */
+MPC_API mpc_int_t mpc_demux_chap_nb(mpc_demux * d);
+/**
+ * Gets datas associated to a given chapter
+ * The chapter tag is an APEv2 tag without the preamble
+ * @param d pointer to a musepack demuxer
+ * @param chap_nb chapter number you want datas (from 0 to mpc_demux_chap_nb(d) - 1)
+ * @return the chapter information structure
+ */
+MPC_API mpc_chap_info const * mpc_demux_chap(mpc_demux * d, int chap_nb);
+
+#ifdef __cplusplus
+}
+#endif
+#endif